<?php

/* *
 * @Project NUKEVIET-MUSIC
 * @Author Phan Tan Dung (phantandung92@gmail.com)
 * @Copyright (C) 2011 Freeware
 * @Createdate 26/01/2011 10:12 AM
 */

define("FTP_TIMEOUT",90);

// FTP Statuscodes
define("FTP_COMMAND_OK",200);
define("FTP_FILE_ACTION_OK",250);
define("FTP_FILE_TRANSFER_OK",226);
define("FTP_COMMAND_NOT_IMPLEMENTED",502);
define("FTP_FILE_STATUS",213);
define("FTP_NAME_SYSTEM_TYPE",215);
define("FTP_PASSIVE_MODE",227);
define("FTP_PATHNAME",257);
define("FTP_SERVICE_READY",220);
define("FTP_USER_LOGGED_IN",230);
define("FTP_PASSWORD_NEEDED",331);
define("FTP_USER_NOT_LOGGED_IN",530);
	
if (!defined("FTP_ASCII")) define("FTP_ASCII",0);
if (!defined("FTP_BINARY")) define("FTP_BINARY",1);

class FTP {

	var $passiveMode = TRUE;
	var $lastLines = array();
	var $lastLine = "";
	var $controlSocket = NULL;
	var $newResult = FALSE;
	var $lastResult = -1;
	var $pasvAddr = NULL; 
		
	var $error_no = NULL;
	var $error_msg = NULL;
		
	function FTP() {}

	function connect($host, $port=21, $timeout=FTP_TIMEOUT) { //Opens an FTP connection
		$this->_resetError();

		$err_no = 0;
		$err_msg = "";
		$this->controlSocket = @fsockopen($host, $port, $err_no, $err_msg, $timeout) or $this->_setError(-1,"fsockopen failed"); 
		if ($err_no<>0) $this->_setError($err_no,$err_msg);

		if ($this->_isError()) return false;
			
		@socket_set_timeout($this->controlSocket,$timeout) or $this->_setError(-1,"socket_set_timeout failed");
		if ($this->_isError()) return false;
			
		$this->_waitForResult();
		if ($this->_isError()) return false;
			
		return $this->getLastResult() == FTP_SERVICE_READY;
	}
		
	function isConnected() {
		return $this->controlSocket != NULL;
	}
		
	function disconnect() {
		if (!$this->isConnected()) return;
		@fclose($this->controlSocket);
	}

	function close() { //Closes an FTP connection
			$this->disconnect();
	}
		
	function login($user, $pass) {  //Logs in to an FTP connection
		$this->_resetError();

		$this->_printCommand("USER $user");
		if ($this->_isError()) return false;

		$this->_waitForResult();
		if ($this->_isError()) return false;

		if ($this->getLastResult() == FTP_PASSWORD_NEEDED){
			$this->_printCommand("PASS $pass");
			if ($this->_isError()) return FALSE;

			$this->_waitForResult();
			if ($this->_isError()) return FALSE;
		}
			
		$result = $this->getLastResult() == FTP_USER_LOGGED_IN;
		return $result;
	}

	function cdup() { //Changes to the parent directory
		$this->_resetError();

		$this->_printCommand("CDUP");
		$this->_waitForResult();
		$lr = $this->getLastResult();
		if ($this->_isError()) return FALSE;
		return ($lr==FTP_FILE_ACTION_OK || $lr==FTP_COMMAND_OK);
	}
		
	function cwd($path) {
		$this->_resetError();

		$this->_printCommand("CWD $path");
		$this->_waitForResult();
		$lr = $this->getLastResult();
		if ($this->_isError()) return FALSE;
		return ($lr==FTP_FILE_ACTION_OK || $lr==FTP_COMMAND_OK);
	}

	function cd($path) {
		return $this->cwd($path);
	}

	function chdir($path) { //Changes directories on a FTP server
		return $this->cwd($path);
	}

	function chmod($mode,$filename) { //Set permissions on a file via FTP
		return $this->site("CHMOD $mode $filename");
	}

	function delete($filename) { //Deletes a file on the FTP server
		$this->_resetError();

		$this->_printCommand("DELE $filename");
		$this->_waitForResult();
		$lr = $this->getLastResult();
		if ($this->_isError()) return FALSE;
		return ($lr==FTP_FILE_ACTION_OK || $lr==FTP_COMMAND_OK);
	}

	function exec($cmd) { //Requests execution of a program on the FTP server
		return $this->site("EXEC $cmd");
	}

	function fget($fp,$remote,$mode=FTP_BINARY,$resumepos=0) { //Downloads a file from the FTP server and saves to an open file
		$this->_resetError();
			
		$type = "I";
		if ($mode==FTP_ASCII) $type = "A";
			
		$this->_printCommand("TYPE $type");
		$this->_waitForResult();
		$lr = $this->getLastResult();
		if ($this->_isError()) return FALSE;
			
		$result = $this->_download("RETR $remote");
		if ($result) {
			fwrite($fp,$result);
		}
		return $result;
	}

	function fput($remote,$resource,$mode=FTP_BINARY,$startpos=0) { //Uploads from an open file to the FTP server
		$this->_resetError();
			
		$type = "I";
		if ($mode==FTP_ASCII) $type = "A";
			
		$this->_printCommand("TYPE $type");
		$this->_waitForResult();
		$lr = $this->getLastResult();
		if ($this->_isError()) return FALSE;
			
		if ($startpos>0) fseek($resource,$startpos);
		$result = $this->_uploadResource("STOR $remote",$resource);
		return $result;
	}

	function get_option($option) { //Retrieves various runtime behaviours of the current FTP stream
		$this->_resetError();

		switch ($option) {
			case "FTP_TIMEOUT_SEC" : return FTP_TIMEOUT;
			case "PHP_FTP_OPT_AUTOSEEK" : return FALSE;
		}
		setError(-1,"Unknown option: $option");
		return false;
	}

	function get($locale,$remote,$mode=FTP_BINARY,$resumepos=0) { //Downloads a file from the FTP server
		if (!($fp = @fopen($locale,"wb"))) return FALSE;
		$result = $this->fget($fp,$remote,$mode,$resumepos);
		@fclose($fp);
		if (!$result) @unlink($locale);
		return $result;
	}
	
	function mdtm($name) { //Returns the last modified time of the given file
		$this->_resetError();

		$this->_printCommand("MDTM $name");
		$this->_waitForResult();
		$lr = $this->getLastResult();
		if ($this->_isError()) return FALSE;
		if ($lr!=FTP_FILE_STATUS) return FALSE;
		$subject = trim(substr($this->lastLine,4));
		$lucifer = array();
		if (preg_match("/([0-9][0-9][0-9][0-9])([0-9][0-9])([0-9][0-9])([0-9][0-9])([0-9][0-9])([0-9][0-9])/",$subject,$lucifer)) return mktime($lucifer[4],$lucifer[5],$lucifer[6],$lucifer[2],$lucifer[3],$lucifer[1],0);
		return FALSE;
	}

	function mkdir($name) { //Creates a directory
		$this->_resetError();

		$this->_printCommand("MKD $name");
		$this->_waitForResult();
		$lr = $this->getLastResult();
		if ($this->_isError()) return FALSE;
		return ($lr==FTP_PATHNAME || $lr==FTP_FILE_ACTION_OK || $lr==FTP_COMMAND_OK);
	}

	function nb_continue() { //Continues retrieving/sending a file (non-blocking)
		$this->_resetError();
		// todo
	}

	function nb_fget() { //Retrieves a file from the FTP server and writes it to an open file (non-blocking)
		$this->_resetError();
		// todo
	}

	function nb_fput() { //Stores a file from an open file to the FTP server (non-blocking)
		$this->_resetError();
		// todo
	}

	function nb_get() { //Retrieves a file from the FTP server and writes it to a local file (non-blocking)
		$this->_resetError();
		// todo
	}

	function nb_put() { //Stores a file on the FTP server (non-blocking)
		$this->_resetError();
		// todo
	}

	function nlist($remote_filespec="") { //Returns a list of files in the given directory
		$this->_resetError();
		$result = $this->_download(trim("NLST $remote_filespec"));
		return ($result !== FALSE) ? explode("\n",str_replace("\r","",trim($result))) : $result;
	}
		
	function pasv($pasv) { //Turns passive mode on or off
		if (!$pasv) {
			$this->_setError("Active (PORT) mode is not supported");
			return false;
		}
		return true;
	}

	function put($remote,$local,$mode=FTP_BINARY,$startpos=0) { //Uploads a file to the FTP server
		if (!($fp = @fopen($local,"rb"))) return FALSE;
		$result = $this->fput($remote,$fp,$mode,$startpos);
		@fclose($fp);
		return $result;
	}

	function pwd() { //Returns the current directory name
		$this->_resetError();

		$this->_printCommand("PWD");
		$this->_waitForResult();
		$lr = $this->getLastResult();
		if ($this->_isError()) return FALSE;
		if ($lr!=FTP_PATHNAME) return FALSE;
		$subject = trim(substr($this->lastLine,4));
		$lucifer = array();
		if (preg_match("/\"(.*)\"/",$subject,$lucifer)) return $lucifer[1];
		return FALSE;
	}

	function quit() { //Alias of close
		$this->close();
	}

	function raw($cmd) { //Sends an arbitrary command to an FTP server
		$this->_resetError();

		$this->_printCommand($cmd);
		$this->_waitForResult();
		$this->getLastResult();
		return array($this->lastLine);
	}

	function rawlist($remote_filespec="") { //Returns a detailed list of files in the given directory
		$this->_resetError();
		$result = $this->_download(trim("LIST $remote_filespec"));
		return ($result !== FALSE) ? explode("\n",str_replace("\r","",trim($result))) : $result;
	}
		
	function ls($remote_filespec="") { //Returns a parsed rawlist in an assoc array
		$a = $this->rawlist($remote_filespec);
		if (!$a) return $a;
		$systype = $this->systype();
		$is_windows = stristr($systype,"WIN")!==FALSE;
		$b = array();
		while (list($i,$line) = each($a)) {
			if ($is_windows && preg_match("/([0-9]{2})-([0-9]{2})-([0-9]{2}) +([0-9]{2}):([0-9]{2})(AM|PM) +([0-9]+|<DIR>) +(.+)/",$line,$lucifer)) {
				$b[$i] = array();
				if ($lucifer[3]<70) { $lucifer[3]+=2000; } else { $lucifer[3]+=1900; } // 4digit year fix
				$b[$i]['isdir'] = ($lucifer[7]=="<DIR>");
				$b[$i]['size'] = $lucifer[7];
				$b[$i]['month'] = $lucifer[1];
				$b[$i]['day'] = $lucifer[2];
				$b[$i]['year'] = $lucifer[3];
				$b[$i]['hour'] = $lucifer[4];
				$b[$i]['minute'] = $lucifer[5];
				$b[$i]['time'] = @mktime($lucifer[4]+(strcasecmp($lucifer[6],"PM")==0?12:0),$lucifer[5],0,$lucifer[1],$lucifer[2],$lucifer[3]);
				$b[$i]['am/pm'] = $lucifer[6];
				$b[$i]['name'] = $lucifer[8];
			} else if (!$is_windows && $lucifer=preg_split("/[ ]/",$line,9,PREG_SPLIT_NO_EMPTY)) {
				echo $line."\n";
				$lcount=count($lucifer);
				if ($lcount<8) continue;
				$b[$i] = array();
				$b[$i]['isdir'] = $lucifer[0]{0} === "d";
				$b[$i]['islink'] = $lucifer[0]{0} === "l";
				$b[$i]['perms'] = $lucifer[0];
				$b[$i]['number'] = $lucifer[1];
				$b[$i]['owner'] = $lucifer[2];
				$b[$i]['group'] = $lucifer[3];
				$b[$i]['size'] = $lucifer[4];
				if ($lcount==8) {
					sscanf($lucifer[5],"%d-%d-%d",$b[$i]['year'],$b[$i]['month'],$b[$i]['day']);
					sscanf($lucifer[6],"%d:%d",$b[$i]['hour'],$b[$i]['minute']);
					$b[$i]['time'] = @mktime($b[$i]['hour'],$b[$i]['minute'],0,$b[$i]['month'],$b[$i]['day'],$b[$i]['year']);
					$b[$i]['name'] = $lucifer[7];
				} else {
					$b[$i]['month'] = $lucifer[5];
					$b[$i]['day'] = $lucifer[6];
					if (preg_match("/([0-9]{2}):([0-9]{2})/",$lucifer[7],$l2)) {
						$b[$i]['year'] = date("Y");
						$b[$i]['hour'] = $l2[1];
						$b[$i]['minute'] = $l2[2];
					} else {
						$b[$i]['year'] = $lucifer[7];
						$b[$i]['hour'] = 0;
						$b[$i]['minute'] = 0;
					}
					$b[$i]['time'] = strtotime(sprintf("%d %s %d %02d:%02d",$b[$i]['day'],$b[$i]['month'],$b[$i]['year'],$b[$i]['hour'],$b[$i]['minute']));
					$b[$i]['name'] = $lucifer[8];
				}
			}
		}
		return $b;
	}

	function rename($from,$to) { //Renames a file on the FTP server
		$this->_resetError();

		$this->_printCommand("RNFR $from");
		$this->_waitForResult();
		$lr = $this->getLastResult();
		if ($this->_isError()) return FALSE;
		$this->_printCommand("RNTO $to");
		$this->_waitForResult();
		$lr = $this->getLastResult();
		if ($this->_isError()) return FALSE;
		return ($lr==FTP_FILE_ACTION_OK || $lr==FTP_COMMAND_OK);
	}

	function rmdir($name) { //Removes a directory
		$this->_resetError();

		$this->_printCommand("RMD $name");
		$this->_waitForResult();
		$lr = $this->getLastResult();
		if ($this->_isError()) return FALSE;
		return ($lr==FTP_FILE_ACTION_OK || $lr==FTP_COMMAND_OK);
	}

	function set_option() { //Set miscellaneous runtime FTP options
		$this->_resetError();
		$this->_setError(-1,"set_option not supported");
		return false;
	}

	function site($cmd) { //Sends a SITE command to the server
		$this->_resetError();

		$this->_printCommand("SITE $cmd");
		$this->_waitForResult();
		$lr = $this->getLastResult();
		if ($this->_isError()) return FALSE;
		return true;
	}

	function size($name) { //Returns the size of the given file
		$this->_resetError();

		$this->_printCommand("SIZE $name");
		$this->_waitForResult();
		$lr = $this->getLastResult();
		if ($this->_isError()) return FALSE;
		return $lr==FTP_FILE_STATUS ? trim(substr($this->lastLine,4)) : FALSE;
	}

	function ssl_connect() { //Opens an Secure SSL-FTP connection
		$this->_resetError();
		$this->_setError(-1,"ssl_connect not supported");
		return false;
	}

	function systype() { // Returns the system type identifier of the remote FTP server
		$this->_resetError();
			
		$this->_printCommand("SYST");
		$this->_waitForResult();
		$lr = $this->getLastResult();
		if ($this->_isError()) return FALSE;
		return $lr==FTP_NAME_SYSTEM_TYPE ? trim(substr($this->lastLine,4)) : FALSE;
	}

	function getLastResult() {
		$this->newResult = FALSE;
		return $this->lastResult;
	}
		
	/* private */
	function _hasNewResult() {
		return $this->newResult;
	}
		
	/* private */
	function _waitForResult() {
		while(!$this->_hasNewResult() && $this->_readln()!==FALSE && !$this->_isError()) { /* noop  */ }
	}
		
	/* private */
	function _readln() {
		$line = fgets($this->controlSocket);
		if ($line === FALSE) {
			$this->_setError(-1,"fgets failed in _readln");
			return FALSE;
		}
		if (strlen($line)==0) return $line;

		$lucifer = array();
		if (preg_match("/^[0-9][0-9][0-9] /",$line,$lucifer)) {
			//its a resultline
			$this->lastResult = intval($lucifer[0]);
			$this->newResult = TRUE;
			if (substr($lucifer[0],0,1)=='5') {
				$this->_setError($this->lastResult,trim(substr($line,4)));
			}
		}
	
		$this->lastLine = trim($line);
		$this->lastLines[] = "< ".trim($line);
		return $line;
	}
		
	/* private */
	function _printCommand($line) {
		$this->lastLines[] = "> ".$line;
		fwrite($this->controlSocket,$line."\r\n");
		fflush($this->controlSocket);
	}
		
	/* private */
	function _pasv() {
		$this->_resetError();
		$this->_printCommand("PASV");
		$this->_waitForResult();
		$lr = $this->getLastResult();
		if ($this->_isError()) return FALSE;
		if ($lr!=FTP_PASSIVE_MODE) return FALSE;
		$subject = trim(substr($this->lastLine,4));
		$lucifer = array();
		if (preg_match("/\\((\d{1,3}),(\d{1,3}),(\d{1,3}),(\d{1,3}),(\d{1,3}),(\d{1,3})\\)/",$subject,$lucifer)) {
			$this->pasvAddr=$lucifer;
				
			$host = sprintf("%d.%d.%d.%d",$lucifer[1],$lucifer[2],$lucifer[3],$lucifer[4]);
			$port = $lucifer[5]*256 + $lucifer[6];
				
			$err_no=0;
			$err_msg="";
			$passiveConnection = fsockopen($host,$port,$err_no,$err_msg, FTP_TIMEOUT);
			if ($err_no!=0) {
				$this->_setError($err_no,$err_msg);
				return FALSE;
			}

			return $passiveConnection;
		}
		return FALSE;
	}
		
	/* private */
	function _download($cmd) {
		if (!($passiveConnection = $this->_pasv())) return FALSE;
		$this->_printCommand($cmd);
		$this->_waitForResult();
		$lr = $this->getLastResult();
		if (!$this->_isError()) {
			$result = "";
				while (!feof($passiveConnection)) {
					$result .= fgets($passiveConnection);
				}
			fclose($passiveConnection);
			$this->_waitForResult();
			$lr = $this->getLastResult();
			return ($lr==FTP_FILE_TRANSFER_OK) || ($lr==FTP_FILE_ACTION_OK) || ($lr==FTP_COMMAND_OK) ? $result : FALSE;
		} else {
			fclose($passiveConnection);
			return FALSE;
		}
	}

		/* upload */
	function _uploadResource($cmd,$resource) {
		if (!($passiveConnection = $this->_pasv())) return FALSE;
		$this->_printCommand($cmd);
		$this->_waitForResult();
		$lr = $this->getLastResult();
		if (!$this->_isError()) {
			$result = "";
			while (!feof($resource)) {
				$buf = fread($resource,1024);
				fwrite($passiveConnection,$buf);
			}
			fclose($passiveConnection);
			$this->_waitForResult();
			$lr = $this->getLastResult();
			return ($lr==FTP_FILE_TRANSFER_OK) || ($lr==FTP_FILE_ACTION_OK) || ($lr==FTP_COMMAND_OK) ? $result : FALSE;
		} else {
			fclose($passiveConnection);
			return FALSE;
		}
	}
		
	/* private */
	function _resetError() {
		$this->error_no = NULL;
		$this->error_msg = NULL;
	}

	/* private */
	function _setError($no,$msg) {
		if (is_array($this->error_no)) {
			$this->error_no[] = $no;
			$this->error_msg[] = $msg;
		} else if ($this->error_no!=NULL) {
			$this->error_no = array($this->error_no,$no);
			$this->error_msg = array($this->error_msg,$msg);
		} else {
			$this->error_no = $no;
			$this->error_msg = $msg;
		}
	}
		
	/* private */
	function _isError() {
		return ($this->error_no != NULL) && ($this->error_no !== 0);
	}
}
/* end */

?>